Quadtech 1689M, 1689 User Manual
1689/1689M Precision
RLC Digibridge(R)
Instruction Manual
Foml1689-0120-06/D2
(C)QuadTech, Inc., 1992
5 Clock Tower Place, 210 East
Maynard, Massachusetts, U.S.A. 01754
March, 2000
Telephone 978-461-2100
Sales 800-253-1230
Facsimile 978-461-4295
Website www.quadtech.com
The material in this manual is for informational purposes only and is subject to change, without notice. QuadTech
assumes no responsibility for any error or for consequential damages that may result from the misinterpretation of any
procedures in this publication.
Contents
Specifications
Warranty
Introduction -Section 1
Installation - Section 2
Operation -Section 3
Theory -Section 4
Service and Maintenance -Section 5
Parts Lists and Diagrams -Section 6
Instruction Manual Changes (continued)
Page 5-41 -Table 5-7, Capacitance Accuracy Checks
1000 nF 600 ppm
.QDR Display Max column corrected as follows:
Nominal
Value QDR Max
10 pF 6100 ppm
100 pF 2500 ppm
1500 pF 700 ppm
1500 pF 1000 ppm
1500 pF 1700 ppm
6400 pF 500 ppm
10 nF 500 ppm
25 nF 500 ppm
25 nF 800 ppm
25 nF 1500 ppm
100 nF 500 ppm
200 nF 600 ppm
400 nF 600 ppm
400 nF 900 ppm
400 nF 1600 ppm
Page 6-2 -Figure 6-2, 1689 Rear View
Rear view should show new power supply assembly (PN 700011) without line
voltage switch.
Page 6-3 -Mechanical Parts List for 1689, Rear
Items 4 through 7 (power connector, fuse extractor post and line voltage switch and
cover) deleted on new power supply assembly.
Page 6-4 -Figure 6-2(A), 1689M Rear View
Rear view should show new power supply assembly (pN 700011) without line
voltage switch.
Page 6-5 -Mechanical Parts List for 1689M, Rear
Items 3 through 6 (power connector, fuse extractor post, line voltage switch and
cover) deleted on new power supply assembly.
Page 6-15 & Page 6-16 -Parts Lists and Diagrams
Power Supply Assembly shown, PN 1689-2005, has been replaced by Power
Supply Assembly, PN 700011. The 700011 Assembly must be repaired by module
exchange.
Page 6-19, 6-20, 6-21, & 6-22 -Parts Lists and Diagrams
High-speed interface board shown, PN 1689-4720, has been replaced by PN 1689
4620. See instructions supplied with the 1689-9630.
ii
iv
Displays
GO/NO-GO lights are also provided and these are active with all modes of measurement display as long as test limits have
vii
Measurement results may be displayed in four ways as selected by the keyboard: 1) VALUE, 2) % difference, 3)
RLC difference, and 4) BIN NO.
1) The VALUE display can be one of four pairs of measured quantities Land Q, C and D, C and R, or Rand Q. The primary
display (L, C, or R) has five digi~ of resolution and the secondary display D, Q, or R with C) has four digits of resolution.
2) The % difference display indicates the percent deviation of the measured L, C, or R value from a stored NOMINAL
VALUE. The sign of this deviation is indicated.
3) The RLC difference is similar to the % difference except that the deviation is displayed in appropriate units (ohms, henries,
etc.)
4) The BIN NO. display is the number of the bin (0 through 14) into which the component should be sorted. The testing limits
for these bins are set up by the user in the ENTER mode. These test limi~ may be symmetrical or non-symmetrical about the
NOMINAL VALUE. One bin is used for D or Q rejects and one is used for RLC rejects (outside all limits). The sum of the
number of componen~ sorted into each bin may be displayed (99999 max).
Also displayed during entry or upon interrogation are: test frequency, test voltage, number of measurcments
averaged, delay time, nominal value, bin limi~ and bin sum and codes for SPECIAL FUNCTIONS.
been set.
Ranges
Primary Disp/ay:*
C: .00001 pF to 99999 uF
R:
L:
% difference (C, R, or L): .0001% to 99999%; RLC difference: same as R, L, or C.
.000010 to 99999 kO
.00001 nH to 99999 H
If any of these quantities is negative, the NEG RLC indicator light is lit.
TABLE A
Test connections can be broken (handler indexing can begin) as soon as data acquisition is complete (ACQ
line low on handler interface). See Note 4 in tables.
i
x
GR1689 MEASUREMENT RATE
TEST FREQUENCY
MEASUREMENT
RATE 12 Hz 100 Hz 120Hz 1 kHz 10 kHz 100 kHz
SLOW 875 ms 940 ms 940 ms 970 ms 930 ms 930 ms
MEDIUM 670 ms 130 ms 185 ms 200 ms 190 ms 190 ms
FAST 670 ms 125 ms 110 ms 80 ms 75 ms 70 ms
MAX IMUM 670 ms 110 ms* 100 ms* 40 ms 34 ms 33 ms
Notes:1. If the high-speed option is not used, add 19 ms for MAXIMUM, or 38 ms
for SLOW, NEDIUM or FAST measurement.
2. If the display is value, delta%, or deltaRLC, add 6 to 10 ms.
3. If data is output via the IEEE Bus., add 6 to 12 ms.
4. For ACQ, subtract 22 ms for SLOW, MEDIUM or FAST and 12 ms for MAXIMUM.
TABLE B
GR1689M MEASUREMENT RATE
TEST FREQUENCY
MEASUREMENT
RATE 12 Hz 100 Hz 120 Hz 1 kHz 10 kHz 100 kHz
SLOW 875 ms 920 ms 920 ms 950 ms 920 ms 920 ms
MEDIUM 670 ms 120 ms 170 ms 180 ms 170 ms 170 ms
FAST 670 ms 105 ms 90 ms 65 ms 55 ms 55 ms
MAXIMUM 660 ms 101 ms* 86 ms* 32 ms 22 ms 22 ms
Notes: 1. If the high-speed option is not used, add 12 ms for MAXIMUM,
or 24 ms for SLOW, MEDIUM or FAST measurement.
2. If the display is value, delta% or deltaRLC, add 3 to 5 ms.
3. If data is output via the IEEE Bus, add 3 to 6 ms.
4. For ACQ, subtract 11 ms for SLOW, MEDIUM or FAST and 6 ms for MAXIMUM.
* These times can be shortened by 14 ms with reduced accuracy using the quick acquisition routine.
The measurement times are obtained with use of the high-speed measurement option, continuous
measurement mode, bin number display/handler output, and without IEEE-Bus data output. For other
conditions, refer to the table notes.
If the measurement mode is triggered, programmed delay (settling time), if any, should be added.
Normal power up conditions included a programmed delay of 7/f to 12/f ms depending upon
measurement rate. This delay can be programmed to zero or to any value up to 100 sec.
Measurement
Modes
x
Two test modes are available: CONTINUOUS and TRIGGERED.
The CONTINUOUS mode makes successive measurements continuously, updating the display after each
measurement.
TRIGGERED measurements are initiated by the START button, or remotely from the IEEE bus or from the
Handler Interface, and the measurement result is displayed until the next measurement is started.
Average
The AVERAGE of any number of measurements from 1 to 255 may be made as desired in either of the two
MEASURE MODES. In the TRIGGERED mode, the running average is displayed and the final value held until the
START button is again depressed. In the CONTINUOUS mode, only the final value is displayed.
Test Voltage
The RMS test voltage is selectable from 5 mV to 1.275 V in 5 mV steps. The accuracy is: (5% + 2 mV) (1 + .001 f 2) where f
= frequency in kHz.
This voltage may be applied behind a source impedance (which depends on the range) in which case the selected voltage is
the maximum that will be applied and the voltage will be less at the low impedance end of each range. The voltage may be
applied also behind 25 ohms using the CONSTANT VOLTAGE function in which case the applied voltage will be constant
except when low impedances are measured.
Delay
A delay of from 1 to 99999 ms may be added to allow for settling of external switches and to permit a wider selection
of measurement rates.
DC Bias
An internal bias of 2 V may be applied to capacitors under test by means of the INT BIAS key.
An external bias of up to 60 VDC may be applied to capacitors under test using a panel switch. The applied
current should be limited to 200 mA.
The instrument is protected from damage from charged capacitors with a stored energy up to 1 joule at 60 volts or less.
Protection from higher voltages may be provided by external components.
Zeroing
Open: A simple OPEN operation removes the effects of stray capacitance and conductance of the internal test fixture or
any other test fixture or cable.
Short: A similar SHORT zeroing operation removes the effects of series resistance and inductance.
DUT Connections
The 1689 has a built-in test fixture that will accept radial or axial components. The 1689M has BNC
connectors for attachment to a wide variety of measurement accessories. Four terminal (Kelvin) connections are made to
the device under test. The instrument ground is guard for three-terminal measurements.
Keyboard Lock
Xl
A combination of keyboard entries makes the keyboard inactive.
Special Functions
Several special features may bl;: :selected. These include:
Direct range setting
Range extension
Choice of integration time
Blanking of lesser digits
Signal Reversal to reduce hum pickup effects
Selection of the median value of three measurements
A routine that reduces transient delays when bias is applied
Automatic parameter selection
Quick acquisition routine
IEEE-488 Bus/Handler Interface Card (1658-9620)
IEEE-488 Bus (J2 on rear panel with option)
All front panel functions are programmable from the bus. All RLC, DQ, and bin data are available as output
to the bus. Output data format: ASCII or Binary.
The following functions, per IEEE-488, have been implemented:
AHI Acceptor Handshake (Listener)
SHI Source Handshake (Talker).
T5 Talker with normal and talk-only modes (for systems without a controller),
switch selectable on rear panel.
L4 Listener.
SRI Service Request (to request service when measurement is complete and the
instrument is not addressed to talk).
RL2 Remote/Local (no local lockout, no return-to-local switch).
PPO No par all e 1 po 11 .
OC1 Device clear.
DT1 Device Trigger (to start measurement).
CO No controller functions.
Handler Connections (JI rear panel with option)
1. Outputs, Active low: (Open collector drivers rated at 30 V max. Each will sink 16 mA at 0.4 V. External power and pull-up
resistors required).
Bin 0 through bin 9 (10 lines) -Sorting outputs.
ACQ OVER (1 line)-indicates end of data acquisition. Component may be removed (see TEST TIME).
EOT (1 line)-indicates end of test. Bin No. is valid.
2. Input, Active low:
(0 V < VI < 0.4 V, + 2.5 V < Vh < + 5 V)
Start (1 line)-Initiates new measurement.
High-Speed Measurement/Interface Option 1689-9820)
Same as above option but also with high-speed capability to increase measurement rate and five more sorting bins (15
Primary Readout C, R, or L
xi
lines, open collector drives rated at 15 V max. Each will sink 24 mA at 0.5 V). See Measurement Rate specification, above.
Environment
Operating: O to 50 degrees C, 0 to 85% relative humidity.
Storage: -40 to 74degrees C.
When the high-speed option is used, the operating temperature range is O to 40 degrees C.
Temperature Effects (typical)
R, L or C: +/- 5 ppm/degree C.
Q or D: +/- [2 ppm/degree C + (3 ppm/degree C) x (frequency in kHz)]
All specifications refer to 23degree C (calibration temperature).
Power
90 to 125 V or 180 to 250 V AC, 50 to 60 Hz.
Voltage selected by rear panel switch; 50 watts maximum, 40 watts typical. When the high-speed option is
used, the maximum power is 60 watts.
Mechanical
DIMENSIONS (W x H x D):
1689 14.781 x 4.40 x 13.50 in. (375.4 x 111.8 x 342.9 mm) WEIGHT: 13 lbs. (5.9 kg.)
1689M 17.25 x 5.625 x 15.160 in. (438.15 x 142.87 x 385.06 mm) WEIGHT: 17 lbs. (7.71 kg.)
Limit or Error (Accuracy)
NOTES:
xiii
1. The limit of error is a percent of the reading and may be positive or negative.
2. The largest term of the first bracketed factor should be used.
3. CX, RJc, and Lx are the values of the components being tested, and Cmax, Cmin, Rmax, etc., are range constants
given in Table C.
4. The values of Ks, Kfv, and Kcv are all zero for measurements made at 1 kHz, with the SLOW measurement rate and using a
non-CONSTANT 1 V signal. For other test conditions, these constants may be evaluated using Tables D through G.
5. These specifications assume proper OPEN and SHORT zeroing calibrations made at 1 kHz. Much better accuracy is
possible at extreme impedance values if these zeroing calibrations are recent and made at the test frequency to be used. For
example, the SLOW MEASUREMENT rate typically will give 1 % accuracy when measuring 100 Mohm at 30 Hz, 0.lF at 120
Hz, 0.1 pF at 10 kHz, or 0.1 uH at 100 kHz. Even better accuracy is possible if several measurements are averaged.
6. Although L measurements on the 1689 should be capable of the accuracy stated above, calibrations by the National Bureau
of Standards are specified to .02%; this amount should be added to the 1689 specification for inductance measurements if they
are to be used in any manner involving legal certification.
Secondary Readout R with C
NOTES:
Otherwise, the notes for the primary readout apply. When using DQ in PPM, the final term of .0001 should be removed.
xiv
This is not a percent error but rather the amount, posiu've or negative, by which the D or Q reading may be in error.
xv
SERVICE POLICY
QuadTech policy is to maintain product repair capability for a period of five (5) years
after original shipment and to make this capability available at the then prevailing
schedule of charges.
1.1 PURPOSE
INTRODUCTION 1-1
The two Digibridge(R) precision RLC testers, GR1689 and GR1689M, are microprocessor-controlled,
automatic, programmable RLC measuring instruments that provide high accuracy, convenience, speed,
and reliability at low cost. Limit comparison, binning, and internal bias are provided; both test frequency
and voltage are selectable. With an interface option, each Digibridge tester can communicate with other
equipment and respond to remote control.
The versatile, adaptable test fixture, lighted keyboard, and informative display panel make
these Digibridge testers convenient to use. Measurement results are clearly shown with decimal points
and units, which are automatically presented to assure correctness. Display resolution is 5 full digits for
R, L, and C (4 full digits for D, Q, Rs with Cs, and Rp with Cs). Notice that Rs is also known as ESR
(equivalent series resistance).
The basic accuracy is 0.02%. Long-term accuracy and reliability are assured by the
measurement system, which makes these accurate analog measurements over many decades of
impedance without any critical internal adjustments. Calibration to ..ccount for any change of testfixture parameters is semiautomatic; the operator needs to provide only open-circuit and short-circuit
conditions in the procedure. The Digibridge tester normally autoranges and automatically identifies the
principal measurement parameter.
The test fixture, with a pair of plug-in adaptors, receives any common component part (axiallead or radial-lead), so easily that insertion of the device under test (DUT) is a one-hand operation. True
4-terminal connections are made automatically. Extender cables are available for measurements at a
moderate distance from the instrument. They are optional for the 1689 (which has a built-in test fixture,
but requires extension typically for bulky components or parts in an automatic handler). They are
necessary for the 1689M, which has no built-in test fixture.
Limit comparisons facilitate sorting into 13 GO and 2 NO-GO bins.
Programmable test conditions include:
Test frequencies from 12 Hz to 100 kHz
The essential front-panel features of the 1689 are provided on the vertical front of the model 1689M. These include the keypad,
1-2 INTRODUCTION
Test voltages from 5 mV to 1.275 V; bias (2 V)
Delay (before data acquisition) from zero to 99999 ms
Measurement speeds up to 45 per second (with 1689M) or 30 per second (with 1689)
Multi-measurement routines with automatic averaging and/or median taking of
2 to 765 measurements.
Displays: measured values, percentages, differences, ratios, GO/NO-GO, binning
Automatic output of value, bin number, bin summary and other results via IEEE-488
bus
Bias can be applied to capacitors being measured, either by programming the selection of an internal
supply (2 V) or by sliding a switch to connect an external voltage source (up to 60 V).
A choice between two interface options provides full "talker/listener" and "talker only" capabilities consistent with the
standard IEEE-488 bus. (Refer to the IEEE Standard 488-1978, Standard Digital Interface for Programmable Instrumentation. See
paragraph 2.8, in Section 2.) A separate connector also interfaces with component handling and sorting equipment.
1.2 GENERAL DESCRIPTION
1.2.1 Basic 1689 Digibridge
Convenience is enhanced by the arrangement of test fixture and controls on the front ledge, with all
controls for manual operation arranged on a lighted keyboard. Above and behind them, the display panel is inclined and recessed to
enhance visibility of digital readouts and indicators. These indicators and those at the keyboard serve to inform and guide the operator in
manipulating the simple controls, or to indicate that remote control is in effect.
The 1689 instrument stands on a table or bench top. The sturdy metal cabinet is durably finished, in keeping with the longlife circuitry inside. Glass-epoxy circuit boards interconnect and support high-quality components to assure years of dependable
performance. Although intended for bench-top use, this model can be rack mounted, using a type of mount that slides forward for
convenience.
Adaptability to any common ac power line is assured by the removable power cord and the convenient line-voltage switch.
Safety is enhanced by the fused, isolating power transformer and the 3-wire connection.
1.2.2 Basic 1689M Digibridge
display, and the power ON/OFF button. The set of four BNC connectors for connection to the test fixture is supplied on the front panel, but
can be relocated to the rear if that is preferred. The displaypanel and keyboard indicators serve to inform and guide the operator in
manipulating the simple controls, or to indicate that remote control is in effect.
The 1689M instrument also stands on a table or bench, where the bail provided under its front edge can be used to tilt it back
for operator convenience. This model goes particularly well in a rack, with its vertical front pane] and cable connection (from either front or
rear) to a suitable test fixture. The sturdy metal cabinet is durably finished, in keeping with the long-life circuitry inside. Glass-epoxy circuit
boards interconnect and support high-quality components to assure years of dependable performance.
Safety is enhanced by the fused, isolating power transformer and the 3-wire connection
Adaptability to any common ac power line is assured by the remo\rable power cord and the convenient line-voltage switch.
1.2.3 Interface Options
INTRODUCTION 1-3
Either of the two interface options adds I/O capabilities to the instrument, enabling it to control and
respond to parts handling/sorting equipment. Also (via separate connector) either option can be connected in a measurement system using the
IEEE-488 bus. Either "talker/listener" or "talker only" roles can be performed by the Digibridge, by switch selection.
One of the interface options enables the Digibridge to measure at a higher speed than it does without an option. The high-speed
option provides outputs to 15 bins for sorting; the other option, to 10 bins.
1.2.4 References
Electrical and physical characteristics are listed in Specifications at the front of this manual. Interface connections and
instrument dimensions are given in Installation, Section 2. Controls are described below in Section 1; their use, in Operation, Section 3. A
functional description is given in Theory, Section 4.
1.3 CONTROLS, INDICATORS, AND CONNECTORS
Figure 1-2 shows the controls and indicators on the front of the 1689 instrument. Table 1-1 identifies them with descriptions
and functions. Figure 1-1 shows the front of the 1689M model, which is functionally similar.
Similarly, Figure 1-3 shows the controls and connectors on the rear of the 1689; and Table 1-2 identifies them. Figure 1-4
shows the rear of the 1689M model, which is functionally similar.
1-4 INTRODUCTION
Figure 1-2. Front controls and displays. Upper illustration: 1689 Digibridge tester, overall. Lower
illustration: keyboard detail.
Table 1-1
Front Panel Controls and Indicators
Fig. 1-2
Ref No. Name Description Function
1 RLC display Digital display, Display of principal measured value.
5 numerals with If function is MEASURE and display
decimal points selection is VALUE, number indicates
R, L, or C. If display selection is delta% or deltaRLC, indicates
percentage difference (respectively) of R, 1, or C compared to
stored nominal value. If display selection is BIN NO., indicates
bin assignment of measured DUT. If function is ENTER,
displays are indications of programned entries,
special functions, bin sum, status in calibration sequences, etc.
2 Units and Light-spot (LED) Indicates measurement units associ~ted with
multipliers indicators RLC display and secondary display if it is
R. Indicates "%" if display selection
is delta%. None of these indicators
are lit if measurement display is "ratio".
3 "NEG" Light-spot (LED) NEG RLC and Nill Q)R indicate negative signs
indicators indicators associated with RLC and QDR displays.
(For explanations see paragraph 3.3.)
4 QDR display Digital display, If function is MEASURE, display of
4 numerals with secondary measured value or (i f display
decimal points is BIN NO.) blank. If function is ENTER,
RLC and Q)R displays together indicate
programned entries, special functions,
status in calibration sequences, etc.
5 POWER switch Pushbutton (push Switches the Digibridge ON (button in) and
again to release) OFF (button out). OFF position breaks both
sides of power circuit.
6 Other display- Light-spot (LED) RANGE HELD indicates that autoranging is
panel indicators disabled. CONST VOLT indicates that measure
indicators ment source resistance is fixed at a low
value. DQ, in PPM indicates that the D or Q
display is in parts per mi II ion.
7 Test fixture Pair of special Receives radial-lead DUT, making 4-ter
connector; each minal connection automatically. Adaptors
[Not on 1689M] axial-lead DUT. Extension cables
makes dual contact (supplied) make similar connection with
(5-terminal) are available.
8 Reference card Captive pull-out Handy reference inforamtion for basic
1-6
INTRODUCTION
card operation: zeroing, making measurements,
[Not on1689M.] programming test conditions, limit entry,
and bin sorting.
9 Keyboard Group of keys, Manual programming and control. Refer to
indicators, and items 10 through 22 for more detai I,
2 other switches
10 Prograrmling Set of 16 keys, Multipurpose input of programning
keys labeled white and instructions, selections, and data,
yellow for 1689, Dual purposes of keys are indicated by
black and gray for color: White or black labels apply norm
1689M ally. Yellow or gray labels apply immed
iately after you press and release the
[SHIFT] key,
11 thru 14, Each key has Make selection by pressing key repeatedly
20, and 22 associated LED unti I the desired condition is indicated
(See below.) indicators at right of the key.
11 [FUNCTION] key Indicators MEASURE Selection of function. MEASURE enables
and ENTER. measurements and some routines that cannot
be done in ENTER, such as "zero" calibrations, keyboard lock or unlock, and
part
of full recalibration, ENTER enables programming of all special
functions, frequency, voltage, averaging, delay,
nominal value, and binning instructions, (Either function allows selection
of hold range, constant voltage, DQ in ppm, internal bias, parameter,
equivalent circuit, measure mode, measure rate, and
d i s play.)
12 [DISPLAY] key Indicators: VALUE, Selection of displays for MEASURE function;
13 [MEASURE RATE] Indicators: SLOW, Selection of measurernent speed as
delta%, BIN NO. refer to items 1, 2, and 4 for description
of displays. Two indicators are Lit
simultaneously for deltaRLC. This key
has no effect on ENTER function displays
key MED, FAST. i n d i cat e d. Spee d is also affectcd by
many other choices described in paragraph
3.5. Use SLOW for better accurac y, use
FAST for speed
14 [MEASURE MODE] Indicators: CONT, Mode selection: CONT, continuously
Selection of principal measurement parameter
INTRODUCTION 1-7
key TRIGGERED repeating measurements; TRIGGERED,
single measurement initiated by START
button or input signal.
15 BIAS ON LED indicator Indicates that internal bias is on, or the
indi cator EXTERNAL BIAS swi tch is ON.
16 EXTERNAL BIAS Slide switch, 2 To connect and disconnect the external bias
switch positions: ON, circuit (rear connector, cable supplied).
OFF
17 GO/NO-GO Pair of LED GO means measured value is acceptable,
indicators indicators based on the limits previously stored.
(See paragraph 3.8.) NO-GO means RLC or QDR value or both are
unacceptable. Indicator remains lighted during next
me as u r erne n t .
18 START button Pushbutton switch. Starts measurement sequence (aborting any
measurernent that may be in process). Normally used in
TRIGGERED measure mode.
19 REMOTE OONTROL LED indicator Indicates when remote control is
indicator established by external command.
(Functions only if an interface option
is installed.)
20 EQUIVALENT Indicators: SERIES Selection of equivalent circuit. Measured
21 SHIFT key Key labeled SHIFT Pressing this shi fts the role of any
22 Parameter Set of 3 keys,
CIRCUIT key and PARALLEL principal R, L, C and secondary R values
(not D or Q) depend on this selection.
key labeled with both white and yellow
(or black and gray) F~ the white 1U yellow or black to gray. Do NOT hold
the the [SHIFT] key down; press it first,
then the other key.
keys labeled: R/Q, L/Q, --R, L, or C --and (for C only) secondary
C/D, and C/R, with parameter D or R. Repeated pushing of any
subscripts sand P one parameter key changes range in sequence
1 234 1 ...and hence measurement units.
1 EXTERNAL BIAS Connector, 2 pins, Receives cable (1658-2450, supplied) for
connector labeled 60 V max, external bias supply. Observe the voltage
200 rnA max, + -. and current limits and polarity.
2 TALK switch* Toggle switch. Selection of mode for IEEE-488 interface:
TALK/LISTEN or TALK ONLY, as labeled.
3 Air filter Porous plastic To prevent dirt from entering inlet vent.
sponge
4 Power connector Shrouded 3-wire AC power input. Use appropriate power cord,
labeled plug, conCorming with Belden SPH-386 socket or equivalent.
90-125 V, to International The GenRad 4200-0300 power cord (supplied)
180-250 V, Electrotechnical is rated Cor 125 V.
50-60 Hz, etc. Commission 320.
5 Fuse (labeled Fuse in Short circuit protection. Use Bussman
250 V, 1/2 A, extraction post type MDL or equivalent fuse, 1/2 A,
SLOW BLOW) holder 250 V rating.
6 Line-voltage Slide switch. Adapts power supply to line-voltage ranges,
switch Upper position: as indicated. To operate, use a small
90 to 125 V; screw driver, not a sharp object.
lower position,
180 to 250 V.
7 Vent Air passage Venti lation
8 HANDLER Socket, 24-pin; Connections to component handler (outputs
INTERFACE receives Amphenol are bin numbers and status; input is a
connector* "Microribbon" plug "start" signal).
P/N 5i-30240
(or equiv).
9 Vent Air passage Ventilation
10 IEEE-488 Socket, 24-pin. Input/output connections according to IEEE
INTERFACE Receives IEEE-488 Std 488-1978. Functions: complete remote
connector* interface cable. control. Output of selected resul ts, with
(See paragraph or without controller.
2 .8) .
11 Fuse (1/4 A) Plug-in type,subs - Protects instrument circuitry from
information.
1-10 INTRODUCTION
miniature, quick- damage by charged capacitors.
acting. Manufactesr
Part No.273.250
by LITTLEFUSE, Inc.,
800 E.Northwest Hwy,
Des Plaines IL 60016
* TALK switch and 24-pin connectors are supplied with the interface option only.
1.4 ACCESSORIES
GenRad makes several accessories that enhance the usefulness of each Digibridge. The axiallead adaptors (provided) convert the test fixture to a configuration well suited for axial-lead
components. A choice of extender cables facilitates making connection to a parts handler or to any DUT
that does not readily fit the test fixture. Extender cables are available with your choice of banana plugs,
BNC, or type 874 connectors. Each cable branches into 4 parts, for true 4-terminal connections (and
guard) to the device being measured, without appreciable reduction in measurement accuracy. A remote
test fixture is available to receive hand-inserted components at a distance from the Digibridge.
Other useful accessories are offered. Refer to Tables 1-3, 1-4 and inquire at the nearest
Digibridge Technical Support Center. (Refer to the back of this manual.)
NOTE
The GenRad line of Digibridge test
fixtures, adaptors, and other accessories
does continue to be improved and
expanded. Inquire periodically at your
local GenRad sales office for the latest
1 supplied Power cord, 200 cm (6.5 ft) long, 3-wire, AWG No.18, 4200-0300
with molded connector bodies. One end, with Belden
SPH-386 socket, fits instrument. Other end conforms
to ANSI standard C73.11-1966 (125 V max).
2 supplied Test-fixture adaptors, for axial-lead parts. 1657-5995
Replacements available: set of 4 adaptors
1 supplied Bias cable, with built-in fuse, to connect external 1658-2450
bias supply and switching circuit.
1 recornnended High-speed measurement and lEEE-488/handl er 1689-9620
interface option retrofit (plug-in).
OR
1 recornnended IEEE-488/handler interface option retrofit (plug-in). 1658-9620
1 recornnended Tweezers, for handl ing and measuring chip components 1689-9603
with terminals on opposite (aces. BNC connectors;
127-cm (50-inch) cable. Use with adaptor 1689-9601.
1 recornnended Kelvin CI ip Cable, (or measuring large, low 1689-9606
impedance components. Use with adaptor 1689-9601.
1 recornnended Extender cable for connection to parts handler, 1657-9600
large or remote DOT, custom test fixture, etc.
Length 100 cm (40 in). One end fits test fixture
of Digibridge; other end terminates in 5 stackable
banana plugs.
1 recornnended Test-fixture adaptor, for BNC cable. 1689-9601
1 recomnended B~ cable assembly, 4 color coded cables with known 1689-9602
"stray" parameters, 90 cm (36 in.) long.
1 recomnended Remote test fixture (I ike the fixture on t.he 1689-9600
Digibridge, adaptable in many ways), with BNC
connectors. (Use 1689-9601 adaptor and 1689-9602
cable.)
1 recommended Remote test fixture (like the 1689-9600); also has 1689-9605
of America, 1 Panasonic Way, Secaucus, N.J. 07094).
(Supplied with BNC-to-banana-plug adaptors.)
1-12
INTRODUCTION
START bar, GO/NO-GO lights, which function only if
the Digibridge has an interface option. Use
1689-9601 adaptor and 1689-9602 cable (as well as the 1689-2400 cable,
included with this fixture).
1 available Extender cable for connection to standards, large 1688-9600
1 available Rack mount kit (slides forward for complete access). 1657-9000
1 recommended Calibration kit, contains six Kelvin-connected 1689-9604
1 replacement Battery (Note: shelf life, 10 years; I ife in 8410-3480*
*Use the following battery if available: Panasonic part number BR-2/3A-F1 (Matsushita Electric Corp.
or remote DUT, custom t est fix t u r e, dielectric
measurement cell, etc. Length 30 cm (12 in). One
end fits test fixture of Digibridge, other end
terminates in four type 874 coaxial connectors.
references (four precision resistances, open, and
short), that plug into the built-in or 1689-9600/9605
test fixture.
instrument is 5 to 10 years. Refer to paragraph
3.13. )
1 supplied Power cord, 200 cm (6.5 ft) long, 3-wire, 4200-0300
1 supplied Bias cable, with built-in fuse, to connect 1658-2450
1 supplied BNC cable assembly, 4 color coded cables with 1689-9602
AWG No. 18, with molded connector bodies. One
end, with Belden SPH-386 socket, fits instrument.
Other end conforms to ANSI standard C73.11-1966
(125 V max).
external bias supply and switching circuit.
known "stray" parameters, 90 cm (36 in.) long.
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